After tomorrow, it will be spring.

Après: preposition, after …, equivalent to English after.

Des Moines: The noun of time, tomorrow, is equivalent to the English word tomorrow.

C'est: main line structure, indicating judgment, ... is ..., which is equivalent to English it is…… ... ...

Le: masculine singular definite article, equivalent to English.

Paris Spring department store: time nouns, spring, spring, equivalent to English spring.